Hermantjs gebabdus monkhobst



H; s. MONKHORST. HOLLOW HANDLE FOR SCREW mes, PIPE CUTTj-IR S,,AND SIMILAR TOOLS;

Patented Dec. 2, 1919.

APPLICATION FILED APR. 29. 1919.

; UNITED STATES PATENT oFruo HERMANUS GERARDUS MONKHORSZ L, OF DELFT,NETHERLANDS.

HOLLOW HANDLE FOR SCREW-DIES, PIPE-CUTTERS, AND SIMILAR TOOLS.

To all whom it may concern:

. Be it known that I, HERMANUs GnRARoUs MONKHORST, a subject of the Queen of the and relating to hollow handles for screw dies, pipe cutters and similar tools, of the.

Netherlands, and residing at Delft, Netherlands, have invented certain new and useful Improvements in Hollow Handles for Screw Dies, Pipe Gutters, and Similar Tools, of which the following is a specification.

This invention is for improvements in munication through a narrow-passage with a pump forming part of the handle and having a piston adapted to be actuated from outside against the action of a spring member.

In the accompanying drawing:

Figure 1 is a longitudinal sectional view of my improved handle,

Fi 2 is a sectional view on AB in Fig.

OD in crewed on one end of the tubular handle 1 is a mouth piece 2 havin screw thread 52 out upon it for securin it to the chuck of the tool for which t e handle is designed. The other end of the handle 1 is closed by a piece 3 having a central bore hole serving for guiding the shank 5'of a pressure knob 5 the said shank having secured to its inner end a piston 6 and aleather sleeve 7 Mounted inside the handle 1 is a piston rod 8 integral with a piston 9, a coiled spring 10 bearing against aninternal collar 11 of the handle 1 tending to keep the rod 8 in end contact with the pis: ton 6.

The piston 9 is adapted to reciprocate in a cylindrical chamber 12 of the mouthpiece 2, a narrow passage 13 in said mouth piece opening on one side in the hollow space'l l inclosed by the handle 1, and on the other side in the cylindrical chamber 12 just front of the piston 9 in its highest position.

The mouth piece 2 has a second chamber 16 in communication with the cylindrical Fig. 3 is a sectional view onchamber 12 through a narrow passa e 15 normally closed by a ball valve 18 orced- Specification of Letters Patent. Applicatioii' filed April 29, 1919. Serial No. 293,478.

Patented Dec. 2, 1919.

on its seat by a'coiled spring 17. 4' The said spring 17 'bears against a nozzle 19 having a screw connection with themouth piece 2. 4

' The'handle. 1 has a filling opening normally closed by a screw 20, and a vent 21. Suppose. the space 14 of the handle 1 to be filled with lubricant, the latter will not at first enter the cylinder 12 owin to the restricted section of passage 13. f now the knob 5 is forced inward against the 12 is --compressed by the piston 9, whereby the ball valve 18 is lifted from its seat and the air allowed to escape through the nozzle 19. On the reverse motion of the piston'9 under the influence of. the spring 10 a vacuum is produced in the space 12 as the ball valve 18 now keeps the passa e 15 closed by the action of its spring 17 en the piston 9' has nearly reached its highest position it uncovers the openingof the passage 13' so that lubricant from" the storing 'action of spring 10, the air in the cylinder space 14 .is permitted to flow into the cylinder 12. On the next inward stroke of the piston 9 caused by a stroke on the knob 5 the lubricant now contained in the cylinder 12 is forced out through the nozzle 19, and

so on.

It will be understood that successive strokes on the knob 5 -cause equal quantities of lubricant to be successively forced out. On each reverse stroke of the piston 6 by the operation of the spring 10 air taking its passage-between the sleeve 7 and the inner wall of the handle 1 is allowed to enter the space 14, thus preventing the production of a vacuum in the said space 14. and, in consequence, any interference with the proper operation of the pump.

vided with a hole for allowing the jet of WhatI claim as my invention is:

1. A handle of the character describeda As a matter of course the chuck on which the handle 1 is to be screwed should be pro-.

comprising a sleeve adapted to hold a suit- I able quantltyi of lubricant, a plug in one end of the sleeve, said plug having a hollow extension formed with a port which communicates with the interior of the extension and open at its inner-end, a piston in the hollow extension, a rod extending from said piston,

a piston in the op osite endof the sleeve, a spring tending to hold the piston rod in end contact'with the second mentioned means for imparting lengthwise motion to piston,

the second mentioned piston against the action of the said spn ng, the plug having a passage connecting-the said-MHow-extensmn and openet its. outer end, andspringectuated valve which tends to hold thelast said passage closed.

2; A handle of t-he #elass deseribed, ee m-Q prising a sleeve, a plug having exedueed end threaded in one end of the sleeve and-provided iWit-h,8. cylindrical: istQn ehamher, ,e

' .v'alve chamber formed-in t e-phlg communiton .rodflextendin ,the central portlon (if the eating with the piston chamber, e .-s prii1g ressed valve themin n01 ma1ly\cl0sed,;a ;top m the plu halvmga hole-therein eommumenting: witi ably J ID ItEd in the piston chambeeza there rom and itheaid the valve chambenjpiston -.s1i d- .sleeve, the plug u ving a pert connecting plsten ehamber with the sleeve, and means .at the qpposite Y nd'ef the slee e ,fqr'actuating ethe plsten.

,the piston .wherebye i v e .thechamber wlll'beexpelled, hespmngne- 35 the piston is wit 3. A handle of the-class described comprising a sleeve "provided at one'end with an epemng and. wrestr'rcted eham'ber, the wall f. t-1 1e chan1her ,ha\zin .aipont which com: mumcate'siw'lth thein rioi thereo'f and the inthe chamhennoi'melly uncovering the end of 'the p01 't comxniimcating with said chamber, a sprlng in.the.s1eeve-. t0.hold.tbe piston :in normal position, and means fer qperating fiamst thevtenslontof the spring,

time

\HERMMIUS enwmus Immense for the subsequent operars1ee e,-va 'sprlng actuated valve normally; j

' eloslng the inner endof the 0pening,.a pisten v v 40 jln testlmeny .whereof I efiix mysggnature. 

